| DOI: | 10.1002/2013GL058976
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| 论文题名: | Brown carbon in the continental troposphere |
| 作者: | Liu J.; Scheuer E.; Dibb J.; Ziemba L.D.; Thornhill K.L.; Anderson B.E.; Wisthaler A.; Mikoviny T.; Devi J.J.; Bergin M.; Weber R.J.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-10259
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| EISSN: | 1944-9990
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| 出版年: | 2014
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| 卷: | 41, 期:6 | | 起始页码: | 2191
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| 结束页码: | 2195
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| 语种: | 英语
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| 英文关键词: | aerosol light absorption
; brown carbon
; direct radiative forcing
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| Scopus关键词: | Atmospheric radiation
; Carbon
; Light absorption
; Troposphere
; Aerosol light absorption
; Brown carbons
; Direct aerosol radiative forcing
; Direct radiative forcing
; Particulate filters
; Particulate organic compounds
; Radiative transfer model
; Tropospheric columns
; Aerosols
; aerosol property
; biomass burning
; black carbon
; particulate organic matter
; radiative forcing
; radiative transfer
; troposphere
; vertical profile
; United States
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| 英文摘要: | Little is known about the optical significance of light absorbing particulate organic compounds (i.e., brown carbon, BrC), including the importance relative to black carbon (BC) and influence on direct radiative forcing by aerosols. The vertical profile of BrC affects its radiative forcing, yet the distribution of BrC in the free troposphere is largely unknown. In this study, BrC absorption was directly measured in solvent extracts of particulate filters obtained from aircraft sampling over the continental USA. Excluding biomass burning plumes, BrC was observed throughout the tropospheric column (<13 km), and its prevalence increased relative to BC with increasing altitude, indicating contributions from secondary sources. Closure analysis showed good agreement between light absorption from BC plus BrC relative to measured total aerosol absorption. A radiative transfer model indicated that BrC absorption reduced top of atmosphere aerosol forcing by ∼20%, suggesting that it is an important component of direct aerosol radiative forcing. © 2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84896411944&doi=10.1002%2f2013GL058976&partnerID=40&md5=46dbb3ec6cea45a396e3bbbc70d4870d
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/7523
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| Appears in Collections: | 气候减缓与适应
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作者单位: | School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, United States
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| Recommended Citation: | |
Liu J.,Scheuer E.,Dibb J.,et al. Brown carbon in the continental troposphere[J]. Geophysical Research Letters,2014-01-01,41(6).
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